- Author : Nils Neugebohrn
- Publisher :
- Release : 2016
- ISBN :
- Pages : pages
Electronic Transport and Potential Barriers at the MoSe2 Mo Back Contact in Cu In Ga Se2 Solar Cells
Download or read book Electronic Transport and Potential Barriers at the MoSe2 Mo Back Contact in Cu In Ga Se2 Solar Cells written by Nils Neugebohrn and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis, the MoSe2-Mo back contact of Cu(In,Ga)Se2 solar cells was investigated and its impact for CIGSe solar cells was assessed. An investigation of a MoSe2/Mo samples, in which Mo layers with varied sodium supply were selenized, revealed, that the sodium mainly diffuses to the sample surface and MoSe2/Mo interface. While an inverse relation between sodium supply and the thickness of the MoSe2 layer was found, the sodium content had hardly an impact on the resistivity of the MoSe2 layers. To investigate the presence of a barrier at the back contact, a study of samples with isolated back contact structures was realized. By the means of IVT measurements, a barrier was found to be present at the CIGSe/MoSe2 interface, while the MoSe2/Mo interface could be classified to be ohmic. Based on all the experimental previous results, a simulation model of the CIGSe solar cell was set up to enable a comprehensive understanding of the impact of the back contact on the solar cell characteristics. engl.